--- loncom/homework/externalresponse.pm	2005/10/18 13:58:12	1.5
+++ loncom/homework/externalresponse.pm	2010/12/21 01:53:08	1.18
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # external style responses
 #
-# $Id: externalresponse.pm,v 1.5 2005/10/18 13:58:12 albertel Exp $
+# $Id: externalresponse.pm,v 1.18 2010/12/21 01:53:08 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,35 +25,67 @@
 #
 # http://www.lon-capa.org/
 #
-# 1/26 Guy
+
+
+
 package Apache::externalresponse;
 use strict;
 use HTTP::Request::Common;
 use Apache::loncapagrade;
 use Apache::lonnet;
+use Apache::lonlocal;
 
 BEGIN {
     &Apache::lonxml::register('Apache::externalresponse',('externalresponse'));
 }
 
-#FIXME
-# send of response params and there current values
-# accept a string to be printed out (Where does it get shown?) (.message)
-# need to get a correct answer from somewhere (probably here since randomized)
+=pod
+
+=head1 FIXME (start_externalresponse)
+
+send of response params and their current values (form good enough? what parameters to send?)
+Need to get returned message displayed
+
+=cut
+
+
 sub start_externalresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
     my $id = &Apache::response::start_response($parstack,$safeeval);
+
+    if ($target eq 'edit') {
+  	$result .=&Apache::edit::tag_start($target,$token);
+	$result .=&Apache::edit::text_arg('URL:','url',$token,60).'<br />';
+	$result .=&Apache::edit::text_arg(&mt('Answer:'),'answer',$token);
+	$result .=&Apache::edit::text_arg(&mt('Form:'),'form',$token).'<br />';
+        $result .=&Apache::edit::text_arg(&mt('Answer display:'),'answerdisplay',$token,80);
+	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag =
+	    &Apache::edit::get_new_args($token,$parstack,$safeeval,
+					'answerdisplay','answer','form','url');
+	if ($constructtag) {
+	    $result = &Apache::edit::rebuild_tag($token);
+	}
+    } elsif ($target eq 'meta') {
+  	$result=&Apache::response::meta_package_write('externalresponse');
+    }
+    
     return $result;
 }
 
 sub end_externalresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
+    my $part=$Apache::inputtags::part;
+    my $id = $Apache::inputtags::response['-1'];
+    my $increment     = 1;
     if ($target eq 'grade') {
-	if ( defined $env{'form.submitted'}) {
-	    my $id = $Apache::inputtags::response['-1'];
-	    my $response = $env{'form.HWVAL_'.$id};
+	if (  &Apache::response::submitted('scantron') ) {
+	    my $increment=&Apache::response::scored_response($part,$id);
+	} elsif ( &Apache::response::submitted() ) {
+	    my $response = &Apache::response::getresponse();
 	    if ( $response =~ /[^\s]/) {
 		my $url = &Apache::lonxml::get_param('url',$parstack,$safeeval);
 		my $answer = &Apache::lonxml::get_param('answer',$parstack,$safeeval);
@@ -66,35 +98,95 @@ sub end_externalresponse {
 		&Apache::lonhomework::showhash(%form);
 		my $ua = LWP::UserAgent->new;
 		my $res = $ua->request(POST $url, \%form);
-		my $partid = $Apache::inputtags::part;
-		my $id = $Apache::inputtags::response['-1'];
 		my %previous = &Apache::response::check_for_previous($response,
-								     $partid,$id);
+								     $part,$id);
 		%Apache::loncapagrade::results=();
-		if ($res->{_rc} != '200') {
-		    $Apache::loncapagrade::results{'awardetail'}='ERROR';
+		$Apache::lonhomework::results{"resource.$part.$id.submission"}=$response;
+		if ($res->is_error()) {
+		    $Apache::loncapagrade::results{'awarddetail'}='ERROR';
 		} else {
-		    &Apache::lonxml::register('Apache::loncapagrade',('loncapagrade'));
+		    &Apache::lonxml::register('Apache::loncapagrade',
+					      ('loncapagrade'));
+		    @Apache::scripttag::parser_env = @_;
 		    my $result=&Apache::scripttag::xmlparse($res->{_content});
 		    &Apache::lonxml::debug("Got a result of :$result:");
 		}
-		foreach my $key (%Apache::loncapagrade::results) {
-		    $Apache::lonhomework::results{"resource.$partid.$id.$key"}=
+		foreach my $key (keys(%Apache::loncapagrade::results)) {
+		    $Apache::lonhomework::results{"resource.$part.$id.$key"}=
 			$Apache::loncapagrade::results{$key};
 		}
+                $Apache::externalresponse::message=$Apache::loncapagrade::results{'message'};
 		&Apache::response::handle_previous(\%previous,
 						   $Apache::loncapagrade::results{'awarddetail'});
 		&Apache::lonxml::debug("response of");
 		&Apache::lonhomework::showhash(%$res);
+		&Apache::lonxml::debug("capagrade of");
 		&Apache::lonhomework::showhash(%Apache::loncapagrade::results);
+		&Apache::lonxml::debug("results of");
+		&Apache::lonhomework::showhash(%Apache::lonhomework::results);
 	    }
 	}
     }
-    &Apache::response::end_response;
+    if ($target eq 'web') {
+	&Apache::response::setup_prior_tries_hash(\&format_prior_response);
+        if (&Apache::response::show_answer()) {
+           $result.='<table border="1"><tr><th>'.&mt('Your answer:').'</th></tr><tr><td><pre>'.
+                    $Apache::lonhomework::history{"resource.$part.$id.submission"}.
+                    '</pre></td></table><br />'.&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval).
+                    '<br />';
+        }
+        if ($Apache::externalresponse::message) {
+           $result.='<br /><table><tr><td bgcolor="#FFFFAA">'.$Apache::externalresponse::message.'</td></tr></table><br />';
+        }
+        $Apache::externalresponse::message='';
+    }
+
+    if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
+	$target eq 'tex' || $target eq 'analyze') {
+	&Apache::lonxml::increment_counter($increment, "$part.$id");
+
+	if ($target eq 'analyze') {
+            $Apache::lonhomework::analyze{"$part.$id.type"} = 'externalresponse';
+	    &Apache::lonhomework::set_bubble_lines();
+	}
+    }
+    &Apache::response::end_response();
     return $result;
 }
 
+sub format_prior_response {
+    my ($mode,$answer) =@_;
+    return '<span class="LC_prior_external">'.
+	    &HTML::Entities::encode($answer,'"<>&').'</span>';
+}
+
 1;
 __END__
 
 
+=pod
+
+=head1 NAME
+
+Apache::externalresponse.pm
+
+=head1 SYNOPSIS
+
+Handler to evaluate externally graded responses.
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+=head1 SUBROUTINES
+
+=over
+
+=item start_externalresponse()
+
+=item end_externalresponse()
+
+=item format_prior_response()
+
+=back
+
+=cut